What does the Biasi E04 fault code mean?

Your boiler has stopped working because the water pressure is too low for the system to run safely.

How much does it cost to fix Biasi error code E04?

Typical repair cost for the Biasi E04 fault is £0-160 including labour.

Locate the filling loop (usually a silver flexible hose) underneath the boiler.

Primary circuit water pressure switch intervention (Low water pressure)

This is a high severity fault. Stop using the boiler and call a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.

Six most common causes of dropping pressure.

Step-by-step using the filling loop.

7 signs repair isn't worth it anymore.